CN104732954A - AMOLED white balance adjusting method and system - Google Patents
AMOLED white balance adjusting method and system Download PDFInfo
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- CN104732954A CN104732954A CN201310712307.XA CN201310712307A CN104732954A CN 104732954 A CN104732954 A CN 104732954A CN 201310712307 A CN201310712307 A CN 201310712307A CN 104732954 A CN104732954 A CN 104732954A
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Abstract
The invention discloses an AMOLED white balance adjusting method and system. The method comprises the steps of obtaining a brightness and service life attenuation curve of red-green-blue macromolecule light-emitting materials in an AMOLED, then adjusting the current flowing through a pixel according to the preset adjusting time and the brightness and service life attenuation curve during usage, and maintaining the while balance of the pixel. Due to the fact that the brightness and service life attenuation curve of the AMOLED must be tested before delivery of any product, no extra measurement is needed; during usage, automatic adjustment of the while balance is performed only by judging whether the working time reaches the preset adjusting time, the adjusting time detection is convenient, workloads are small, and implementation is convenient.
Description
Technical field
The present invention relates to AMOLED to control, specifically a kind of method of adjustment of AMOLED white balance and adjustment System.
Background technology
AMOLED(English full name is: Active-matrix organic light-emitting diode means active matrix organic light-emitting diode or active-matrix organic light emitting diode), be a kind of display technique be applied in TV and mobile device.Wherein AM(active matrix body or active-matrix body) refer to pixel addressing technique behind, particular type-organic electric-excitation luminescent display of film display technique that what OLED (organic light emitting diode) described is.Organic light emitting display (OLED) is active illuminating device.Compare present main flow flat panel display Thin Film Transistor-LCD (TFT-LCD), OLED has high-contrast, wide viewing angle, low-power consumption, the advantages such as volume is thinner, being expected to the flat panel display of future generation become after LCD, is one of the maximum technology that receives publicity in current flat panel display.
The white of AMOLED display is synthesized by red-green-blue, and the brightness proportioning of adjustment RGB can obtain corresponding white balance, shown in Figure 1, AMOLED device is longer for service time, the brightness decay ratio of AMOLED device is larger, and the damped cycle of AMOLED device three-color light-emitting material is not identical: red decay is the slowest, and green is taken second place, blue decay is the fastest, after a certain time, three colour brightness proportionings change, and cause white balance to offset, make white partially yellow, extreme influence display effect.And Ge great mobile phone manufacturer, all using especially white for chromaticity coordinate coordinate as one of critical specifications, whether white balance up to standard directly affects screen display quality.
The active-matrix Organic Light Emitting Diode that Chinese patent literature CN2738515Y discloses a kind of dynamic conditioning white balance starts control circuit, the multiple programmable voltage sources provided with programmable voltage generator are provided, red respectively as active-matrix organic LED display panel, green, the power supply of blue pixel, and with a wwhite balance control circuit, carry out the service condition according to active-matrix organic LED display panel, namely material attenuate situation, carry out the magnitude of voltage in dynamic conditioning program voltage source, realize the object of the white balance of adjustment active-matrix organic LED display panel, material attenuate situation wherein bears the number of the GTG display of more than certain value especially by calculating this active-matrix Organic Light Emitting Diode within a certain period of time.The number bearing the GTG display of more than certain value in this patent document by measuring active-matrix Organic Light Emitting Diode in the given time judges the decline situation of material, need the number of the GTG display of measuring more than each pixel certain value in real time, the workload detecting grey exponent number and counting is large, increase the weight of the burden of processor reason, be inconvenient to implement.
Summary of the invention
For this reason, to be solved by this invention is that the number bearing the GTG display of more than certain value in prior art by measuring active-matrix Organic Light Emitting Diode in the given time judges the large technical matters of being inconvenient to implement of surveying work amount that the decline situation of material is brought, and provides a kind of method of adjustment and adjustment System of AMOLED white balance.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A method of adjustment for AMOLED white balance, comprises the steps:
Obtain brightness and the life time decay curve of red, green and blue three look high-molecular luminous material in AMOLED;
Work timing is carried out to each pixel in described AMOLED, obtains the working time of described pixel;
Judge whether the working time of described pixel reaches predetermined regulation time, as reached, according to described brightness and life time decay curve, the electric current flowing through described pixel being adjusted, maintaining the white balance of this pixel.
The method of adjustment of described a kind of AMOLED white balance, is also included in the interval schedule time on described brightness and life time decay curve and takes out the brightness value of three kinds of colors and calculate the step of brightness decay ratio obtaining the brightness of red, green and blue three look high-molecular luminous material and the step of life time decay curve in AMOLED; Described being specially the electric current adjustment flowing through described pixel according to described brightness and life time decay curve adjusts the electric current flowing through described pixel according to described brightness decay ratio.
The method of adjustment of described a kind of AMOLED white balance, the clock signal that each pixel in described AMOLED is carried by IC carries out work timing.
The method of adjustment of described a kind of AMOLED white balance, in the processor of described brightness decay ratio and the corresponding described AMOLED device of working time burned use in advance.
The method of adjustment of described a kind of AMOLED white balance, the step of the white balance of described this pixel of maintenance comprises further: keep the drive current of red pixel constant, increases the drive current of green pixel and blue pixel simultaneously.
The method of adjustment of described a kind of AMOLED white balance, the step of the white balance of described this pixel of maintenance comprises further: keep the drive current of blue pixel constant, reduce the drive current of red pixel and green pixel simultaneously.
The method of adjustment of described a kind of AMOLED white balance, the step of the white balance of described this pixel of maintenance comprises further: keep the drive current of green pixel constant, the drive current reducing red pixel improves the drive current of blue pixel simultaneously.
Meanwhile, a kind of adjustment System of AMOLED white balance is provided, comprises:
Load module, obtains brightness and the life time decay curve of red, green and blue three look high-molecular luminous material in AMOLED;
Timing module, carries out work timing to each pixel in described AMOLED, obtains the working time of described pixel;
Judge module, judges whether the working time of described pixel reaches predetermined regulation time, as reached, enters adjusting module;
Adjusting module, adjusts the electric current flowing through described pixel according to described brightness and life time decay curve, maintains the white balance of this pixel.
The adjustment System of described a kind of AMOLED white balance, described load module is also included in the interval schedule time on described brightness and life time decay curve and takes out the brightness value of three kinds of colors and calculate the computing module of brightness decay ratio; Described adjusting module is specially the module adjusted the electric current flowing through described pixel according to described brightness decay ratio.
The adjustment System of described a kind of AMOLED white balance, described timing module carries out work timing to the clock signal that each pixel in described AMOLED is carried by IC.
Technique scheme of the present invention has the following advantages compared to existing technology:
The method of adjustment of a kind of AMOLED white balance of the present invention and adjustment System, first, obtain brightness and the life time decay curve of red, green and blue three look high-molecular luminous material in AMOLED, according to described predetermined regulation time and brightness and life time decay curve, the electric current flowing through described pixel is adjusted again during use, maintain the white balance of this pixel.Because the brightness of AMOLED device and life time decay curve are that any a product must be tested before dispatching from the factory, therefore without the need to extra mensuration, also only need whether reach according to the working time the automatic adjustment that default regulation time carries out white balance during use, adjustment is easy to detect for opportunity, workload is little, convenient enforcement.
The method of adjustment of a kind of AMOLED white balance of the present invention and adjustment System, after the brightness obtaining red, green and blue three look high-molecular luminous material in AMOLED and life time decay curve, being also included in the interval schedule time on described brightness and life time decay curve takes out the brightness value of three kinds of colors and calculates the step of brightness decay ratio; Described being specially the electric current adjustment flowing through described pixel according to described brightness and life time decay curve adjusts the electric current flowing through described pixel according to described brightness decay ratio.In the processor of described brightness decay ratio and the corresponding working time device of the described AMOLED of burned use in advance.Computation burden when described AMOLED device is actual carries out blank level adjustment can be reduced, be particularly suitable for the AMOLED device that processing power is relatively low.
The method of adjustment of a kind of AMOLED white balance of the present invention and adjustment System, by keeping the drive current of red pixel constant, the drive current simultaneously improving green pixel and blue pixel carries out blank level adjustment.Such energy obtains better display brightness, but owing to improving the drive current of green pixel and blue pixel, may cause green pixel and the minimizing in serviceable life of blue pixel, and then cause reduce the serviceable life of device.
The method of adjustment of a kind of AMOLED white balance of the present invention and adjustment System, by keeping the drive current of blue pixel constant, the drive current simultaneously reducing red pixel and green pixel carries out blank level adjustment.Can extend the serviceable life of AMOLED device to a certain extent, but display brightness is lower.
The method of adjustment of a kind of AMOLED white balance of the present invention and adjustment System, by keeping the drive current of green pixel constant, the drive current simultaneously reducing red pixel and the blue pixel of raising carries out blank level adjustment.Can obtain good display brightness like this, the serviceable life of red pixel can be extended to a certain extent but serviceable life of blue pixel can be reduced simultaneously.Because the rate of decay of green pixel is between red pixel and blue pixel, this scheme for benchmark, allows red pixel current reduce with the rate of decay of green pixel, and blue pixel current increases, the electric current of two other pixel is avoided to reduce simultaneously or increase, can better the relation of equilbrium brightness and Decay.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is a kind of brightness decay ratio and time-varying relationship schematic diagram of AMOLED device;
Fig. 2 be one embodiment of the invention in life time decay curve every the data plot that time period intercepts;
Fig. 3 is the dough softening schematic diagram of AMOLED device three kinds of luminescent materials in one embodiment of the invention;
Fig. 4 is the process flow diagram of the method for adjustment of a kind of AMOLED white balance of one embodiment of the invention;
Fig. 5 is the structured flowchart of the adjustment System of a kind of AMOLED white balance of one embodiment of the invention.
Embodiment
Embodiment 1
Shown in Figure 4, be the method for adjustment of a kind of AMOLED white balance of one embodiment of the invention, specifically comprise the steps:
S1: the brightness and the life time decay curve that obtain red, green and blue three look high-molecular luminous material in AMOLED; Wherein obtain brightness and life time decay curve all can carry out after any a AMOLED device output, therefore, the application can directly utilize product export before the brightness that detects and life time decay curve, without the need to testing separately.
S2: work timing is carried out to each pixel in described AMOLED, obtains the working time of described pixel.
S3: judging whether the working time of described pixel reaches predetermined regulation time, as reached, walking around into step S4; Otherwise repeat this step.
S4: according to described brightness and life time decay curve, the electric current flowing through described pixel is adjusted, maintain the white balance of this pixel.
Because the brightness of AMOLED device and life time decay curve are that any a product must be tested before dispatching from the factory, therefore without the need to extra mensuration, also only need whether reach according to the working time the automatic adjustment that default regulation time carries out white balance during use, easy to detect during adjustment, workload is little, convenient enforcement.
Embodiment 2
As second embodiment of the present invention, on the basis of above-described embodiment 1, the method of adjustment of the AMOLED white balance of the present embodiment is after the brightness obtaining red, green and blue three look high-molecular luminous material in AMOLED and life time decay curve, and being also included in the interval schedule time on described brightness and life time decay curve takes out the brightness value of three kinds of colors and calculate the step of brightness decay ratio; The time interval is shorter in theory, then blank level adjustment is more accurate, but the calculated amount of IC or CPU can be larger simultaneously, preferably, choose and according to described brightness decay ratio, the electric current flowing through described pixel is adjusted for being specially the electric current adjustment flowing through described pixel according to described brightness and life time decay curve described in 50hs interval time.
Embodiment 3
On the basis of above-described embodiment 2, in the method for adjustment of the AMOLED white balance of the present embodiment, the clock signal that each pixel in described AMOLED is carried by IC carries out work timing.
Embodiment 4
On the basis of above-described embodiment 3, in the method for adjustment of the AMOLED white balance of the present embodiment, in the processor of described brightness decay ratio and the corresponding described AMOLED device of working time burned use in advance.As a kind of embodiment, shown in Figure 2, took out the brightness value of three kinds of colors every 1250 hours and calculate brightness decay ratio, and by this brightness decay ratio with in the processor of the corresponding described AMOLED device of working time burned use in advance.Within 1250 hours, be described for interval in this example, certainly can according to adjusting interval time, such as 30 hours, interval or other longer interval times.
The present embodiment precalculates attenuation ratio, without the need to when blank level adjustment again row calculate, computation burden when described AMOLED device is actual carries out blank level adjustment can be reduced, be particularly suitable for the AMOLED device that processing power is relatively low.
Embodiment 5
On the basis of above-mentioned any embodiment, in the method for adjustment of a kind of AMOLED white balance of the present embodiment, the step of the white balance of described this pixel of maintenance comprises further: keep the drive current of red pixel constant, increases the drive current of green pixel and blue pixel simultaneously.
The method of adjustment of a kind of AMOLED white balance of the present embodiment can obtain better display brightness, but owing to increasing the drive current of green pixel and blue pixel, may cause green pixel and the minimizing in serviceable life of blue pixel, and then cause reduce the serviceable life of device.
Certainly, as other embodiments of the present invention, in order to keep the display brightness of AMOLED device constant, the drive current of the drive current of red pixel, the drive current of green pixel and blue pixel can be increased simultaneously.
Embodiment 6
On the basis of above-mentioned any embodiment, in the method for adjustment of a kind of AMOLED white balance of the present embodiment, the step of the white balance of described this pixel of maintenance comprises further: keep the drive current of blue pixel constant, reduce the drive current of red pixel and green pixel simultaneously.
The method of adjustment of a kind of AMOLED white balance of the present embodiment, can extend the serviceable life of AMOLED device to a certain extent, but display brightness is lower.
Embodiment 7
On the basis of above-mentioned any embodiment, in the method for adjustment of a kind of AMOLED white balance of the present embodiment, the step of the white balance of described this pixel of maintenance comprises further: keep the drive current of green pixel constant, the drive current reducing red pixel improves the drive current of blue pixel simultaneously.
Specifically shown in Figure 3, once use for certain, suppose screen use 10000 constantly little, the brightness of RGB tri-look residue is respectively 90%, 83%, 77% of initial value, then L (R)-L (G)=7%, L (G)-L (B)=6%.In order to avoid white balance drift, make three colour brightness proportionings consistent with original state, need red pixel driving current to reduce 7%, blue pixel driving current increases 6%, compensates, draw close to green pixel haematochrome and the decay of blue pixel intensity.And, further, adjustment modes can be divided into slightly, moderate, severe or be divided into Pyatyi or multistage, can carry out from main separation for the hobby of white balance color according to user.
The method of adjustment of a kind of AMOLED white balance of the present embodiment adjusts between two parties, the blue pixel right relative to embodiment 5, and the drive current increase rate of blue pixel is less, can reduce the impact on blue pixel serviceable life to a certain extent.Can obtain good display brightness like this, the serviceable life of red pixel can be extended to a certain extent but serviceable life of blue pixel can be reduced simultaneously.Because the rate of decay of green pixel is between red pixel and blue pixel, this scheme for benchmark, allows red pixel current reduce with the rate of decay of green pixel, and blue pixel current increases, the electric current of two other pixel is avoided to reduce simultaneously or increase, can better the relation of equilbrium brightness and Decay.
Embodiment 8
Shown in Figure 5, the present invention correspondingly provides a kind of adjustment System of AMOLED white balance, comprising:
Load module, obtains brightness and the life time decay curve of red, green and blue three look high-molecular luminous material in AMOLED;
Timing module, carries out work timing to each pixel in described AMOLED, obtains the working time of described pixel;
Judge module, judges whether the working time of described pixel reaches predetermined regulation time, as reached, enters adjusting module;
Adjusting module, adjusts the electric current flowing through described pixel according to described predetermined regulation time and brightness and life time decay curve, maintains the white balance of this pixel.
The adjustment System of described a kind of AMOLED white balance, described load module is also included in the interval schedule time on described brightness and life time decay curve and takes out the brightness value of three kinds of colors and calculate the computing module of brightness decay ratio; Described adjusting module is specially the module adjusted the electric current flowing through described pixel according to described brightness decay ratio.
In the adjustment System of a kind of AMOLED white balance of the present embodiment, because the brightness of AMOLED device and life time decay curve are that any a product must be tested before dispatching from the factory, therefore without the need to extra mensuration, also only need whether reach according to the working time the automatic adjustment that default regulation time carries out white balance during use, easy to detect during adjustment, workload is little, convenient enforcement.
As a kind of embodiment, the adjustment System of described a kind of AMOLED white balance, described timing module carries out work timing to the clock signal that each pixel in described AMOLED is carried by IC.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (10)
1. a method of adjustment for AMOLED white balance, is characterized in that, comprises the steps:
Obtain brightness and the life time decay curve of red, green and blue three look high-molecular luminous material in AMOLED;
Work timing is carried out to each pixel in described AMOLED, obtains the working time of described pixel;
Judge whether the working time of described pixel reaches predetermined regulation time, as reached, according to described brightness and life time decay curve, the electric current flowing through described pixel being adjusted, maintaining the white balance of this pixel.
2. the method for adjustment of a kind of AMOLED white balance according to claim 1, it is characterized in that, be also included in the interval schedule time on described brightness and life time decay curve and take out the brightness value of three kinds of colors and calculate the step of brightness decay ratio obtaining the brightness of red, green and blue three look high-molecular luminous material and the step of life time decay curve in AMOLED; Described being specially the electric current adjustment flowing through described pixel according to described brightness and life time decay curve adjusts the electric current flowing through described pixel according to described brightness decay ratio.
3. the method for adjustment of a kind of AMOLED white balance according to claim 2, is characterized in that, the clock signal that each pixel in described AMOLED is carried by IC carries out work timing.
4. the method for adjustment of a kind of AMOLED white balance according to claim 3, is characterized in that, in the processor of described brightness decay ratio and the corresponding described AMOLED device of working time burned use in advance.
5. according to the method for adjustment of the arbitrary described a kind of AMOLED white balance of claim 1-4, it is characterized in that, the step of the white balance of described this pixel of maintenance comprises further: keep the drive current of red pixel constant, increases the drive current of green pixel and blue pixel simultaneously.
6. according to the method for adjustment of the arbitrary described a kind of AMOLED white balance of claim 1-4, it is characterized in that, the step of the white balance of described this pixel of maintenance comprises further: keep the drive current of blue pixel constant, reduce the drive current of red pixel and green pixel simultaneously.
7. according to the method for adjustment of the arbitrary described a kind of AMOLED white balance of claim 1-4, it is characterized in that, the step of the white balance of described this pixel of maintenance comprises further: keep the drive current of green pixel constant, the drive current reducing red pixel improves the drive current of blue pixel simultaneously.
8. an adjustment System for AMOLED white balance, is characterized in that, comprising:
Load module, obtains brightness and the life time decay curve of red, green and blue three look high-molecular luminous material in AMOLED;
Timing module, carries out work timing to each pixel in described AMOLED, obtains the working time of described pixel;
Judge module, judges whether the working time of described pixel reaches predetermined regulation time, as reached, enters adjusting module;
Adjusting module, adjusts the electric current flowing through described pixel according to described brightness and life time decay curve, maintains the white balance of this pixel.
9. the adjustment System of a kind of AMOLED white balance according to claim 8, it is characterized in that, described load module is also included in the interval schedule time on described brightness and life time decay curve and takes out the brightness value of three kinds of colors and calculate the computing module of brightness decay ratio; Described adjusting module is specially the module adjusted the electric current flowing through described pixel according to described brightness decay ratio.
10. the adjustment System of a kind of AMOLED white balance according to claim 8 or claim 9, it is characterized in that, described timing module carries out work timing to the clock signal that each pixel in described AMOLED is carried by IC.
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| CN110853581B (en) * | 2019-11-06 | 2021-03-16 | 深圳市华星光电半导体显示技术有限公司 | Method for adjusting brightness of display panel and storage medium |
| CN110910772A (en) * | 2019-12-13 | 2020-03-24 | 昆山工研院新型平板显示技术中心有限公司 | Double-screen display panel and display device |
| CN111883058A (en) * | 2020-08-17 | 2020-11-03 | 武汉天马微电子有限公司 | Display panel brightness compensation method and device and display device |
| CN114200286A (en) * | 2021-11-30 | 2022-03-18 | 昆山国显光电有限公司 | Performance evaluation method and device for luminescent material of display module |
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